Files with the .sms extension usually contain SMS text messages that have been sent and received by a Sony Ericsson cell phone. When a user exports the messages from the cell phone to their computer, the files are saved with the .sms file extension. The SMS files are saved in a text-based format.
The .sms file extension is also used for Sega Master System emulator ROM image files, Microsoft package definition files, StarPlayer files, Warcraft 2 map files, Train Simulator sound management system files, OpenOffice.org Math application formula document template files and Netscape PHYSICON Interactive plug-in files.
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If you have additional information about the SMS file format or software that uses files with the SMS suffix, please do get in touch - we would love hearing from you.